Initially, I was disappointed. A complex, three-dimensional battle map, the extremely important role of heroes (it took me a year to understand that you need to take more than 2 heroes into your army), the complete disappearance of my favorite faction – the Swamp (hydras, which turned into disgusting and useless creatures – don't count), the disappearance of my favorite heroes and the plot of the third game.
But gradually, I learned to appreciate the merits of the fourth Heroes. It is a complete design and stylistic masterpiece (Heroes 3 and 5, in my opinion, look terrible), the dominant role of heroes on the battlefield (after all, we shouldn't forget that the series proudly bears the name Heroes of Might and Magic), smooth graphics, even if not cutting-edge – but it runs without lag, and the adventure map is, in my opinion, the most beautiful of the entire series in the fourth game. Of course, the appearance of some units leaves something to be desired (elf-bums, black druids, punk wizards, etc.), but many creatures look more beautiful and appropriate than in the other parts of the series – for example, the fourth game has the best angels, magic dragons, and crusaders.
In short, I was waiting for an upgrade to the third game – but I got a completely new game. Which I liked much more than the third, and, ultimately, more than the fifth. Mainly because of the excellently developed magic, design, and heroes.